Unit 2 Concept 2

Question 1

Passive transport

Answer 1

No ATP
High to low concentration
(Down concentration)

Question 2

Active transport

Answer 2

ATP
Low to high concentration

Question 3

Concentration

Answer 3

Amount of solute dissolved in a solvent

Question 4

Concentration gradient

Answer 4

Difference in concentration of a substance from one location to the other

Question 5

Simple diffusion

Answer 5

Spreading out of molecules till equilibrium is reached
O2 CO2

Question 6

Facilitated diffusion

Answer 6

Movement with the help of a transport protein
Large molecules like glucose
And polar molecules

Question 7

Osmosis

Answer 7

Simple diffusion of water molecules
High to low

Question 8

High water concentration means

Answer 8

Low water concentration

Question 9

Low water concentration

Answer 9

High water concentration

Question 10

Hypertonic solutions

Answer 10

Water is lower than the cells cytoplasm
Shrivels

Question 11

Hypotonic

Answer 11

Water is higher than the cells cytoplasm
Swells

Question 12

Isotonic

Answer 12

Identical water and cytoplasm

Question 13

Positive feedback mechanisms

Answer 13

Output intensifies the response
Ex.human birth-fruit ripening

Question 14

Negativel

Answer 14

Output causes a counter response to return to a set point
Ex. Human temp- blood sugar

Question 15

Stimulus

Answer 15

Change in the environment

Question 16

Response

Answer 16

A change in the organism

Question 17

Homeostasis

Answer 17

need of an organism to stay Stable
by regulating
internal conditions

Question 18

Feedback mechanisms

Answer 18

evolve to help maintain homeostasis in
organisms as they respond to stimuli

Question 19

Things that can enter membrane easy are

Answer 19

Small non polar hydrophobic

Question 20

Things that can’t are

Answer 20

Polar large molecules